Hello,
I was looking at my 8566B manual and going through basic calibration with the 100 MHz signal into the RF in. Anyway when I select full span and punch in recall 8 and set the amplitude and recall 9 for zero span I get no variation like I'm supposed. I then tried error cal by punching shift W frequency span and get half the screen with signal (first preselector step?) and screen freezes. I pressed shift before powering down and restarted but I just get a locked state with no sweep triggering action. By the way, my previous recalls e.g. 2 all work fine just not outside them or outside a recall state.
I must have goofed somewhere. Can anyone help me reset the unit back to normal?
Cheers!
I was looking at my 8566B manual and going through basic calibration with the 100 MHz signal into the RF in. Anyway when I select full span and punch in recall 8 and set the amplitude and recall 9 for zero span I get no variation like I'm supposed. I then tried error cal by punching shift W frequency span and get half the screen with signal (first preselector step?) and screen freezes. I pressed shift before powering down and restarted but I just get a locked state with no sweep triggering action. By the way, my previous recalls e.g. 2 all work fine just not outside them or outside a recall state.
I must have goofed somewhere. Can anyone help me reset the unit back to normal?
Cheers!
Several things could cause this problem including faulty hardware.
Here is what you, the operator can do:
Assure the calibrator cable from the front panel CAL OUTPUT BNC connector to the Type N RF input port is connected during the Recall 8 and Recall 9 calibration procedures. If the calibrator signal is not present, the instrument will stop sweeping during Recall 8 and Recall 9 because the routines expect the 100 MHz, -10 dBm cal signal to be present. If you have another analyzer, or a power meter, connect it to the Cal Output port and measure the calibrator for proper power and frequency.
The other thing is to assure the frequency reference cable (very short BNC cable) on the rear panel is in place, and the slide switch is set to INT if you are using the internal reference. Recall 9 uses the 30 Hz RBW and Zero Span, so if the frequency reference is off by several Hz, there will be no Recall 9 response on the display.
The recall 8 and recall 9 routines automatically set up all necessary instrument settings. Among these are: input attenuation, Span, RBW, sweep time, dB/div, etc. some of these settings you may have never manually set, or the instrument set automatically (as a coupled function) before.
An important thing to realize is that when the instrument is tuned to 100 MHz , the instrument is in “Low Band” (100 kHz to 2.5 GHz). When you turn on the instrument (or press Instrument Preset), it defaults to High Band (2.5 GHz to 22 GHz) and to full span in high band.
The point here is that you may have uncovered a hardware problem by performing the Recall 8 and Recall 9 procedure, and probably you were unaware of this problem since you did not use the settings that Recall 8 or 9 uses.
If the problem is not a missing calibration cable or a faulty calibration cable, or a missing rear panel freq ref cable / switch setting,
I suspect there is a hard ware failure and the unit needs to be sent to a repair facility for repair.
Regards -